# FILESYSTEMS - man(5) - [phpMan]

[_filesystems_(5)](https://www.chedong.com/phpMan.php/man/filesystems/5/markdown)                           File Formats Manual                          [_filesystems_(5)](https://www.chedong.com/phpMan.php/man/filesystems/5/markdown)

## NAME
       filesystems  -  Linux  filesystem  types:  ext,  ext2, ext3, ext4, hpfs, iso9660, JFS, minix,
       msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs

## DESCRIPTION
       When, as is customary, the **proc **filesystem is mounted on _/proc_, you  can  find  in  the  file
       _/proc/filesystems_  which  filesystems  your  kernel  currently supports; see [**proc**(5)](https://www.chedong.com/phpMan.php/man/proc/5/markdown) for more
       details.  There is also a legacy [**sysfs**(2)](https://www.chedong.com/phpMan.php/man/sysfs/2/markdown) system call (whose availability  is  controlled  by
       the  **CONFIG_SYSFS_SYSCALL  **kernel  build  configuration option since Linux 3.15) that enables
       enumeration of the currently available filesystem  types  regardless  of  _/proc_  availability
       and/or sanity.

       If  you  need  a  currently unsupported filesystem, insert the corresponding kernel module or
       recompile the kernel.

       In order to use a filesystem, you have to _mount_ it; see [**mount**(2)](https://www.chedong.com/phpMan.php/man/mount/2/markdown) and [**mount**(8)](https://www.chedong.com/phpMan.php/man/mount/8/markdown).

       The following list provides a short description of the available  or  historically  available
       filesystems  in  the  Linux  kernel.   See  the  kernel  documentation  for  a  comprehensive
       description of all options and limitations.

       **erofs  **is the Enhanced Read-Only File System, stable since Linux 5.4.  See [**erofs**(5)](https://www.chedong.com/phpMan.php/man/erofs/5/markdown).

       **ext    **is an elaborate extension of the **minix **filesystem.  It has been completely  superseded
              by  the second version of the extended filesystem (**ext2**) and has been removed from the
              kernel (in Linux 2.1.21).

       **ext2   **is a disk filesystem that was used by Linux for  fixed  disks  as  well  as  removable
              media.   The  second  extended filesystem was designed as an extension of the extended
              filesystem (**ext**).  See [**ext2**(5)](https://www.chedong.com/phpMan.php/man/ext2/5/markdown).

       **ext3   **is a journaling version of the **ext2 **filesystem.  It is easy to switch back  and  forth
              between **ext2 **and **ext3**.  See [**ext3**(5)](https://www.chedong.com/phpMan.php/man/ext3/5/markdown).

       **ext4   **is  a  set  of  upgrades  to  **ext3  **including  substantial performance and reliability
              enhancements, plus large increases in volume, file, and directory  size  limits.   See
              [**ext4**(5)](https://www.chedong.com/phpMan.php/man/ext4/5/markdown).

       **hpfs   **is  the High Performance Filesystem, used in OS/2.  This filesystem is read-only under
              Linux due to the lack of available documentation.

### iso9660
              is a CD-ROM filesystem type conforming to the ISO/IEC 9660 standard.

              **High Sierra**
                     Linux supports High Sierra, the precursor to the ISO/IEC 9660 standard for  CD-
                     ROM  filesystems.  It is automatically recognized within the **iso9660 **filesystem
                     support under Linux.

              **Rock Ridge**
                     Linux also supports the System Use Sharing Protocol records  specified  by  the
                     Rock  Ridge  Interchange Protocol.  They are used to further describe the files
                     in the **iso9660 **filesystem to a UNIX host, and provide information such as  long
                     filenames,  UID/GID,  POSIX  permissions,  and  devices.   It  is automatically
                     recognized within the **iso9660 **filesystem support under Linux.

       **JFS    **is a journaling filesystem, developed by IBM, that was integrated into Linux 2.4.24.

       **minix  **is the filesystem used in the Minix operating system, the first to  run  under  Linux.
              It  has  a  number  of  shortcomings,  including  a  64 MB partition size limit, short
              filenames, and a single timestamp.  It remains useful for floppies and RAM disks.

       **msdos  **is the filesystem used by DOS, Windows, and some OS/2 computers.  **msdos **filenames  can
              be  no  longer  than  8  characters,  followed  by  an optional period and 3 character
              extension.

       **ncpfs  **is a network filesystem that supports the NCP protocol, used by  Novell  NetWare.   It
              was removed from the kernel in Linux 4.17.

              To  use  **ncpfs**, you need special programs, which can be found at ftp://ftp.gwdg.de/pub
              /linux/misc/ncpfs.

       **nfs    **is the network filesystem used to access disks located on remote computers.

       **ntfs   **is the filesystem native to Microsoft  Windows  NT,  supporting  features  like  ACLs,
              journaling, encryption, and so on.

       **proc   **is  a pseudo filesystem which is used as an interface to kernel data structures rather
              than reading and interpreting _/dev/kmem_.  In particular, its files do  not  take  disk
              space.  See [**proc**(5)](https://www.chedong.com/phpMan.php/man/proc/5/markdown).

### Reiserfs
              is  a  journaling  filesystem, designed by Hans Reiser, that was integrated into Linux
              2.4.1.

       **smb    **is a network filesystem  that  supports  the  SMB  protocol,  used  by  Windows.   See
              [<https://www.samba.org/samba/smbfs/>](<https://www.samba.org/samba/smbfs/>).

       **sysv   **is an implementation of the System V/Coherent filesystem for Linux.  It implements all
              of Xenix FS, System V/386 FS, and Coherent FS.

       **umsdos **is  an  extended DOS filesystem used by Linux.  It adds capability for long filenames,
              UID/GID, POSIX permissions, and special files (devices, named pipes, etc.)  under  the
              DOS filesystem, without sacrificing compatibility with DOS.

       **tmpfs  **is  a  filesystem  whose  contents  reside in virtual memory.  Since the files on such
              filesystems typically reside in RAM, file access is extremely fast.  See [**tmpfs**(5)](https://www.chedong.com/phpMan.php/man/tmpfs/5/markdown).

       **vfat   **is an extended FAT filesystem used by Microsoft Windows95 and Windows NT.   **vfat  **adds
              the capability to use long filenames under the MSDOS filesystem.

       **XFS    **is a journaling filesystem, developed by SGI, that was integrated into Linux 2.4.20.

       **xiafs  **was  designed  and  implemented to be a stable, safe filesystem by extending the Minix
              filesystem code.   It  provides  the  basic  most  requested  features  without  undue
              complexity.   The  **xiafs **filesystem is no longer actively developed or maintained.  It
              was removed from the kernel in Linux 2.1.21.

## SEE ALSO
       [**fuse**(4)](https://www.chedong.com/phpMan.php/man/fuse/4/markdown), [**btrfs**(5)](https://www.chedong.com/phpMan.php/man/btrfs/5/markdown), [**ext2**(5)](https://www.chedong.com/phpMan.php/man/ext2/5/markdown), [**ext3**(5)](https://www.chedong.com/phpMan.php/man/ext3/5/markdown), [**ext4**(5)](https://www.chedong.com/phpMan.php/man/ext4/5/markdown), [**nfs**(5)](https://www.chedong.com/phpMan.php/man/nfs/5/markdown), [**proc**(5)](https://www.chedong.com/phpMan.php/man/proc/5/markdown),  [**sysfs**(5)](https://www.chedong.com/phpMan.php/man/sysfs/5/markdown),  [**tmpfs**(5)](https://www.chedong.com/phpMan.php/man/tmpfs/5/markdown),  [**xfs**(5)](https://www.chedong.com/phpMan.php/man/xfs/5/markdown),
       [**fsck**(8)](https://www.chedong.com/phpMan.php/man/fsck/8/markdown), [**mkfs**(8)](https://www.chedong.com/phpMan.php/man/mkfs/8/markdown), [**mount**(8)](https://www.chedong.com/phpMan.php/man/mount/8/markdown)

Linux man-pages 6.7                          2024-01-28                               [_filesystems_(5)](https://www.chedong.com/phpMan.php/man/filesystems/5/markdown)